Table 3. Sequence identity between human alpha subunits and alpha 1 of other species (PDB ID: 4RES, 4HYT and 4XE5).

Subunit	4RES	4HYT	4XE5
	Identity (%)	Identity (%)	Identity (%)
Human α1	98.24	98.14	97.55
Human α2	86.57	86.57	86.67
Human α3	87.50	87.50	87.69
Human α4	78.69	78.69	78.49